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fune/layout/svg/SVGImageFrame.cpp
Sandor Molnar f5bbecdcc2 Backed out 13 changesets (bug 1711061) on devs request. CLOSED TREE 
Backed out changeset c4f073f7e3a3 (bug 1711061)
Backed out changeset aced4b672fb4 (bug 1711061)
Backed out changeset 3687e798f665 (bug 1711061)
Backed out changeset 7b471990ea86 (bug 1711061)
Backed out changeset 1014a95f540e (bug 1711061)
Backed out changeset a37b3091281d (bug 1711061)
Backed out changeset 96a0ef35881b (bug 1711061)
Backed out changeset 38890cc266fb (bug 1711061)
Backed out changeset be73004c0850 (bug 1711061)
Backed out changeset b964576ae53d (bug 1711061)
Backed out changeset d453c5219255 (bug 1711061)
Backed out changeset 0145b538175b (bug 1711061)
Backed out changeset 41ba2e2a2d13 (bug 1711061)
2021-10-29 00:36:30 +03:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "SVGImageFrame.h"
// Keep in (case-insensitive) order:
#include "gfxContext.h"
#include "gfxPlatform.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/layers/RenderRootStateManager.h"
#include "mozilla/layers/WebRenderLayerManager.h"
#include "imgIContainer.h"
#include "ImageRegion.h"
#include "nsContainerFrame.h"
#include "nsIImageLoadingContent.h"
#include "nsLayoutUtils.h"
#include "imgINotificationObserver.h"
#include "SVGGeometryProperty.h"
#include "SVGGeometryFrame.h"
#include "mozilla/PresShell.h"
#include "mozilla/StaticPrefs_image.h"
#include "mozilla/SVGContentUtils.h"
#include "mozilla/SVGImageContext.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/SVGUtils.h"
#include "mozilla/dom/MutationEventBinding.h"
#include "mozilla/dom/SVGImageElement.h"
#include "nsIReflowCallback.h"
#include "mozilla/Unused.h"
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::image;
using namespace mozilla::dom::SVGPreserveAspectRatio_Binding;
namespace SVGT = SVGGeometryProperty::Tags;
namespace mozilla {
class SVGImageListener final : public imgINotificationObserver {
public:
explicit SVGImageListener(SVGImageFrame* aFrame);
NS_DECL_ISUPPORTS
NS_DECL_IMGINOTIFICATIONOBSERVER
void SetFrame(SVGImageFrame* frame) { mFrame = frame; }
private:
~SVGImageListener() = default;
SVGImageFrame* mFrame;
};
// ---------------------------------------------------------------------
// nsQueryFrame methods
NS_QUERYFRAME_HEAD(SVGImageFrame)
NS_QUERYFRAME_ENTRY(SVGImageFrame)
NS_QUERYFRAME_TAIL_INHERITING(SVGGeometryFrame)
} // namespace mozilla
nsIFrame* NS_NewSVGImageFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGImageFrame(aStyle, aPresShell->GetPresContext());
}
namespace mozilla {
NS_IMPL_FRAMEARENA_HELPERS(SVGImageFrame)
SVGImageFrame::~SVGImageFrame() {
// set the frame to null so we don't send messages to a dead object.
if (mListener) {
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (imageLoader) {
imageLoader->RemoveNativeObserver(mListener);
}
reinterpret_cast<SVGImageListener*>(mListener.get())->SetFrame(nullptr);
}
mListener = nullptr;
}
void SVGImageFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::image),
"Content is not an SVG image!");
SVGGeometryFrame::Init(aContent, aParent, aPrevInFlow);
if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
// Non-display frames are likely to be patterns, masks or the like.
// Treat them as always visible.
// This call must happen before the FrameCreated. This is because the
// primary frame pointer on our content node isn't set until after this
// function ends, so there is no way for the resulting OnVisibilityChange
// notification to get a frame. FrameCreated has a workaround for this in
// that it passes our frame around so it can be accessed. OnVisibilityChange
// doesn't have that workaround.
IncApproximateVisibleCount();
}
mListener = new SVGImageListener(this);
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (!imageLoader) {
MOZ_CRASH("Why is this not an image loading content?");
}
// We should have a PresContext now, so let's notify our image loader that
// we need to register any image animations with the refresh driver.
imageLoader->FrameCreated(this);
imageLoader->AddNativeObserver(mListener);
}
/* virtual */
void SVGImageFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
DecApproximateVisibleCount();
}
if (mReflowCallbackPosted) {
PresShell()->CancelReflowCallback(this);
mReflowCallbackPosted = false;
}
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(nsIFrame::mContent);
if (imageLoader) {
imageLoader->FrameDestroyed(this);
}
nsIFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
/* virtual */
void SVGImageFrame::DidSetComputedStyle(ComputedStyle* aOldStyle) {
SVGGeometryFrame::DidSetComputedStyle(aOldStyle);
if (!mImageContainer || !aOldStyle) {
return;
}
auto newOrientation = StyleVisibility()->mImageOrientation;
if (aOldStyle->StyleVisibility()->mImageOrientation != newOrientation) {
nsCOMPtr<imgIContainer> image(mImageContainer->Unwrap());
mImageContainer = nsLayoutUtils::OrientImage(image, newOrientation);
}
// TODO(heycam): We should handle aspect-ratio, like nsImageFrame does.
}
//----------------------------------------------------------------------
// nsIFrame methods:
nsresult SVGImageFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType) {
if (aNameSpaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::preserveAspectRatio) {
// We don't paint the content of the image using display lists, therefore
// we have to invalidate for this children-only transform changes since
// there is no layer tree to notice that the transform changed and
// recomposite.
InvalidateFrame();
return NS_OK;
}
}
// Currently our SMIL implementation does not modify the DOM attributes. Once
// we implement the SVG 2 SMIL behaviour this can be removed
// SVGImageElement::AfterSetAttr's implementation will be sufficient.
if (aModType == MutationEvent_Binding::SMIL &&
aAttribute == nsGkAtoms::href &&
(aNameSpaceID == kNameSpaceID_XLink ||
aNameSpaceID == kNameSpaceID_None)) {
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
bool hrefIsSet =
element->mStringAttributes[SVGImageElement::HREF].IsExplicitlySet() ||
element->mStringAttributes[SVGImageElement::XLINK_HREF]
.IsExplicitlySet();
if (hrefIsSet) {
element->LoadSVGImage(true, true);
} else {
element->CancelImageRequests(true);
}
}
return SVGGeometryFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void SVGImageFrame::OnVisibilityChange(
Visibility aNewVisibility, const Maybe<OnNonvisible>& aNonvisibleAction) {
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (!imageLoader) {
SVGGeometryFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
return;
}
imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
SVGGeometryFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
}
gfx::Matrix SVGImageFrame::GetRasterImageTransform(int32_t aNativeWidth,
int32_t aNativeHeight) {
float x, y, width, height;
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
element, &x, &y, &width, &height);
Matrix viewBoxTM = SVGContentUtils::GetViewBoxTransform(
width, height, 0, 0, aNativeWidth, aNativeHeight,
element->mPreserveAspectRatio);
return viewBoxTM * gfx::Matrix::Translation(x, y);
}
gfx::Matrix SVGImageFrame::GetVectorImageTransform() {
float x, y;
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y>(element, &x, &y);
// No viewBoxTM needed here -- our height/width overrides any concept of
// "native size" that the SVG image has, and it will handle viewBox and
// preserveAspectRatio on its own once we give it a region to draw into.
return gfx::Matrix::Translation(x, y);
}
bool SVGImageFrame::GetIntrinsicImageDimensions(
mozilla::gfx::Size& aSize, mozilla::AspectRatio& aAspectRatio) const {
if (!mImageContainer) {
return false;
}
ImageResolution resolution = mImageContainer->GetResolution();
int32_t width, height;
if (NS_FAILED(mImageContainer->GetWidth(&width))) {
aSize.width = -1;
} else {
aSize.width = width;
resolution.ApplyXTo(aSize.width);
}
if (NS_FAILED(mImageContainer->GetHeight(&height))) {
aSize.height = -1;
} else {
aSize.height = height;
resolution.ApplyYTo(aSize.height);
}
Maybe<AspectRatio> asp = mImageContainer->GetIntrinsicRatio();
aAspectRatio = asp.valueOr(AspectRatio{});
return true;
}
bool SVGImageFrame::TransformContextForPainting(gfxContext* aGfxContext,
const gfxMatrix& aTransform) {
gfx::Matrix imageTransform;
if (mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
imageTransform = GetVectorImageTransform() * ToMatrix(aTransform);
} else {
int32_t nativeWidth, nativeHeight;
if (NS_FAILED(mImageContainer->GetWidth(&nativeWidth)) ||
NS_FAILED(mImageContainer->GetHeight(&nativeHeight)) ||
nativeWidth == 0 || nativeHeight == 0) {
return false;
}
mImageContainer->GetResolution().ApplyTo(nativeWidth, nativeHeight);
imageTransform = GetRasterImageTransform(nativeWidth, nativeHeight) *
ToMatrix(aTransform);
// NOTE: We need to cancel out the effects of Full-Page-Zoom, or else
// it'll get applied an extra time by DrawSingleUnscaledImage.
nscoord appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
gfxFloat pageZoomFactor =
nsPresContext::AppUnitsToFloatCSSPixels(appUnitsPerDevPx);
imageTransform.PreScale(pageZoomFactor, pageZoomFactor);
}
if (imageTransform.IsSingular()) {
return false;
}
aGfxContext->Multiply(ThebesMatrix(imageTransform));
return true;
}
//----------------------------------------------------------------------
// ISVGDisplayableFrame methods:
void SVGImageFrame::PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
imgDrawingParams& aImgParams,
const nsIntRect* aDirtyRect) {
if (!StyleVisibility()->IsVisible()) {
return;
}
float x, y, width, height;
SVGImageElement* imgElem = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
imgElem, &x, &y, &width, &height);
NS_ASSERTION(width > 0 && height > 0,
"Should only be painting things with valid width/height");
if (!mImageContainer) {
nsCOMPtr<imgIRequest> currentRequest;
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (imageLoader)
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(currentRequest));
if (currentRequest)
currentRequest->GetImage(getter_AddRefs(mImageContainer));
}
if (mImageContainer) {
gfxContextAutoSaveRestore autoRestorer(&aContext);
if (StyleDisplay()->IsScrollableOverflow()) {
gfxRect clipRect =
SVGUtils::GetClipRectForFrame(this, x, y, width, height);
SVGUtils::SetClipRect(&aContext, aTransform, clipRect);
}
if (!TransformContextForPainting(&aContext, aTransform)) {
return;
}
// fill-opacity doesn't affect <image>, so if we're allowed to
// optimize group opacity, the opacity used for compositing the
// image into the current canvas is just the group opacity.
float opacity = 1.0f;
if (SVGUtils::CanOptimizeOpacity(this)) {
opacity = StyleEffects()->mOpacity;
}
if (opacity != 1.0f ||
StyleEffects()->mMixBlendMode != StyleBlend::Normal) {
aContext.PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, opacity);
}
nscoord appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
nsRect dirtyRect; // only used if aDirtyRect is non-null
if (aDirtyRect) {
NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
(mState & NS_FRAME_IS_NONDISPLAY),
"Display lists handle dirty rect intersection test");
dirtyRect = ToAppUnits(*aDirtyRect, appUnitsPerDevPx);
// dirtyRect is relative to the outer <svg>, we should transform it
// down to <image>.
Rect dir(dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
dir.Scale(1.f / AppUnitsPerCSSPixel());
// FIXME: This isn't correct if there is an inner <svg> enclosing
// the <image>. But that seems to be a quite obscure usecase, we can
// add a dedicated utility for that purpose to replace the GetCTM
// here if necessary.
auto mat = SVGContentUtils::GetCTM(
static_cast<SVGImageElement*>(GetContent()), false);
if (mat.IsSingular()) {
return;
}
mat.Invert();
dir = mat.TransformRect(dir);
// x, y offset of <image> is not included in CTM.
dir.MoveBy(-x, -y);
dir.Scale(AppUnitsPerCSSPixel());
dir.Round();
dirtyRect = nsRect(dir.x, dir.y, dir.width, dir.height);
}
uint32_t flags = aImgParams.imageFlags;
if (mForceSyncDecoding) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
if (mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
// Package up the attributes of this image element which can override the
// attributes of mImageContainer's internal SVG document. The 'width' &
// 'height' values we're passing in here are in CSS units (though they
// come from width/height *attributes* in SVG). They influence the region
// of the SVG image's internal document that is visible, in combination
// with preserveAspectRatio and viewBox.
const Maybe<SVGImageContext> context(Some(
SVGImageContext(Some(CSSIntSize::Truncate(width, height)),
Some(imgElem->mPreserveAspectRatio.GetAnimValue()))));
// For the actual draw operation to draw crisply (and at the right size),
// our destination rect needs to be |width|x|height|, *in dev pixels*.
LayoutDeviceSize devPxSize(width, height);
nsRect destRect(nsPoint(), LayoutDevicePixel::ToAppUnits(
devPxSize, appUnitsPerDevPx));
// Note: Can't use DrawSingleUnscaledImage for the TYPE_VECTOR case.
// That method needs our image to have a fixed native width & height,
// and that's not always true for TYPE_VECTOR images.
aImgParams.result &= nsLayoutUtils::DrawSingleImage(
aContext, PresContext(), mImageContainer,
nsLayoutUtils::GetSamplingFilterForFrame(this), destRect,
aDirtyRect ? dirtyRect : destRect, context, flags);
} else { // mImageContainer->GetType() == TYPE_RASTER
aImgParams.result &= nsLayoutUtils::DrawSingleUnscaledImage(
aContext, PresContext(), mImageContainer,
nsLayoutUtils::GetSamplingFilterForFrame(this), nsPoint(0, 0),
aDirtyRect ? &dirtyRect : nullptr, Nothing(), flags);
}
if (opacity != 1.0f ||
StyleEffects()->mMixBlendMode != StyleBlend::Normal) {
aContext.PopGroupAndBlend();
}
// gfxContextAutoSaveRestore goes out of scope & cleans up our gfxContext
}
}
bool SVGImageFrame::CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const mozilla::layers::StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder, DisplaySVGGeometry* aItem,
bool aDryRun) {
if (!StyleVisibility()->IsVisible()) {
return true;
}
float opacity = 1.0f;
if (SVGUtils::CanOptimizeOpacity(this)) {
opacity = StyleEffects()->mOpacity;
}
if (opacity != 1.0f) {
// FIXME: not implemented, might be trivial
return false;
}
if (StyleEffects()->mMixBlendMode != StyleBlend::Normal) {
// FIXME: not implemented
return false;
}
// try to setup the image
if (!mImageContainer) {
nsCOMPtr<imgIRequest> currentRequest;
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (imageLoader) {
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(currentRequest));
}
if (currentRequest) {
currentRequest->GetImage(getter_AddRefs(mImageContainer));
}
}
if (!mImageContainer) {
// nothing to draw (yet)
return true;
}
uint32_t flags = aDisplayListBuilder->GetImageDecodeFlags();
if (mForceSyncDecoding) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
// Compute bounds of the image
nscoord appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
int32_t appUnitsPerCSSPixel = AppUnitsPerCSSPixel();
float x, y, width, height;
SVGImageElement* imgElem = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
imgElem, &x, &y, &width, &height);
NS_ASSERTION(width > 0 && height > 0,
"Should only be painting things with valid width/height");
auto toReferenceFrame = aItem->ToReferenceFrame();
auto appRect = nsLayoutUtils::RoundGfxRectToAppRect(Rect(0, 0, width, height),
appUnitsPerCSSPixel);
appRect += toReferenceFrame;
auto destRect = LayoutDeviceRect::FromAppUnits(appRect, appUnitsPerDevPx);
auto clipRect = destRect;
if (StyleDisplay()->IsScrollableOverflow()) {
// Apply potential non-trivial clip
auto cssClip = SVGUtils::GetClipRectForFrame(this, 0, 0, width, height);
auto appClip =
nsLayoutUtils::RoundGfxRectToAppRect(cssClip, appUnitsPerCSSPixel);
appClip += toReferenceFrame;
clipRect = LayoutDeviceRect::FromAppUnits(appClip, appUnitsPerDevPx);
// Apply preserveAspectRatio
if (mImageContainer->GetType() == imgIContainer::TYPE_RASTER) {
int32_t nativeWidth, nativeHeight;
if (NS_FAILED(mImageContainer->GetWidth(&nativeWidth)) ||
NS_FAILED(mImageContainer->GetHeight(&nativeHeight)) ||
nativeWidth == 0 || nativeHeight == 0) {
// Image has no size; nothing to draw
return true;
}
auto preserveAspectRatio = imgElem->mPreserveAspectRatio.GetAnimValue();
uint16_t align = preserveAspectRatio.GetAlign();
uint16_t meetOrSlice = preserveAspectRatio.GetMeetOrSlice();
// default to the defaults
if (align == SVG_PRESERVEASPECTRATIO_UNKNOWN) {
align = SVG_PRESERVEASPECTRATIO_XMIDYMID;
}
if (meetOrSlice == SVG_MEETORSLICE_UNKNOWN) {
meetOrSlice = SVG_MEETORSLICE_MEET;
}
// aspect > 1 is horizontal
// aspect < 1 is vertical
float nativeAspect = ((float)nativeWidth) / ((float)nativeHeight);
float viewAspect = width / height;
// "Meet" is "fit image to view"; "Slice" is "cover view with image".
//
// Whether we meet or slice, one side of the destRect will always be
// perfectly spanned by our image. The only questions to answer are
// "which side won't span perfectly" and "should that side be grown
// or shrunk".
//
// Because we fit our image to the destRect, this all just reduces to:
// "if meet, shrink to fit. if slice, grow to fit."
if (align != SVG_PRESERVEASPECTRATIO_NONE && nativeAspect != viewAspect) {
// Slightly redundant bools, but they make the conditions clearer
bool tooTall = nativeAspect > viewAspect;
bool tooWide = nativeAspect < viewAspect;
if ((meetOrSlice == SVG_MEETORSLICE_MEET && tooTall) ||
(meetOrSlice == SVG_MEETORSLICE_SLICE && tooWide)) {
// Adjust height and realign y
auto oldHeight = destRect.height;
destRect.height = destRect.width / nativeAspect;
auto heightChange = oldHeight - destRect.height;
switch (align) {
case SVG_PRESERVEASPECTRATIO_XMINYMIN:
case SVG_PRESERVEASPECTRATIO_XMIDYMIN:
case SVG_PRESERVEASPECTRATIO_XMAXYMIN:
// align to top (no-op)
break;
case SVG_PRESERVEASPECTRATIO_XMINYMID:
case SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVG_PRESERVEASPECTRATIO_XMAXYMID:
// align to center
destRect.y += heightChange / 2.0f;
break;
case SVG_PRESERVEASPECTRATIO_XMINYMAX:
case SVG_PRESERVEASPECTRATIO_XMIDYMAX:
case SVG_PRESERVEASPECTRATIO_XMAXYMAX:
// align to bottom
destRect.y += heightChange;
break;
default:
MOZ_ASSERT_UNREACHABLE("Unknown value for align");
}
} else if ((meetOrSlice == SVG_MEETORSLICE_MEET && tooWide) ||
(meetOrSlice == SVG_MEETORSLICE_SLICE && tooTall)) {
// Adjust width and realign x
auto oldWidth = destRect.width;
destRect.width = destRect.height * nativeAspect;
auto widthChange = oldWidth - destRect.width;
switch (align) {
case SVG_PRESERVEASPECTRATIO_XMINYMIN:
case SVG_PRESERVEASPECTRATIO_XMINYMID:
case SVG_PRESERVEASPECTRATIO_XMINYMAX:
// align to left (no-op)
break;
case SVG_PRESERVEASPECTRATIO_XMIDYMIN:
case SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVG_PRESERVEASPECTRATIO_XMIDYMAX:
// align to center
destRect.x += widthChange / 2.0f;
break;
case SVG_PRESERVEASPECTRATIO_XMAXYMIN:
case SVG_PRESERVEASPECTRATIO_XMAXYMID:
case SVG_PRESERVEASPECTRATIO_XMAXYMAX:
// align to right
destRect.x += widthChange;
break;
default:
MOZ_ASSERT_UNREACHABLE("Unknown value for align");
}
}
}
}
}
Maybe<SVGImageContext> svgContext;
if (mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
if (StaticPrefs::image_svg_blob_image()) {
flags |= imgIContainer::FLAG_RECORD_BLOB;
}
// Forward preserveAspectRatio to inner SVGs
svgContext.emplace(Some(CSSIntSize::Truncate(width, height)),
Some(imgElem->mPreserveAspectRatio.GetAnimValue()));
}
Maybe<ImageIntRegion> region;
IntSize decodeSize = nsLayoutUtils::ComputeImageContainerDrawingParameters(
mImageContainer, this, destRect, clipRect, aSc, flags, svgContext,
region);
RefPtr<layers::ImageContainer> container;
ImgDrawResult drawResult = mImageContainer->GetImageContainerAtSize(
aManager->LayerManager(), decodeSize, svgContext, region, flags,
getter_AddRefs(container));
// While we got a container, it may not contain a fully decoded surface. If
// that is the case, and we have an image we were previously displaying which
// has a fully decoded surface, then we should prefer the previous image.
switch (drawResult) {
case ImgDrawResult::NOT_READY:
case ImgDrawResult::TEMPORARY_ERROR:
// nothing to draw (yet)
return true;
case ImgDrawResult::NOT_SUPPORTED:
// things we haven't implemented for WR yet
return false;
default:
// image is ready to draw
break;
}
// Don't do any actual mutations to state if we're doing a dry run
// (used to decide if we're making this into an active layer)
if (!aDryRun) {
// If the image container is empty, we don't want to fallback. Any other
// failure will be due to resource constraints and fallback is unlikely to
// help us. Hence we can ignore the return value from PushImage.
if (container) {
if (flags & imgIContainer::FLAG_RECORD_BLOB) {
aManager->CommandBuilder().PushBlobImage(
aItem, container, aBuilder, aResources, destRect, clipRect);
} else {
aManager->CommandBuilder().PushImage(
aItem, container, aBuilder, aResources, aSc, destRect, clipRect);
}
}
nsDisplayItemGenericImageGeometry::UpdateDrawResult(aItem, drawResult);
}
return true;
}
nsIFrame* SVGImageFrame::GetFrameForPoint(const gfxPoint& aPoint) {
if (!HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD) && !GetHitTestFlags()) {
return nullptr;
}
Rect rect;
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
element, &rect.x, &rect.y, &rect.width, &rect.height);
if (!rect.Contains(ToPoint(aPoint))) {
return nullptr;
}
// Special case for raster images -- we only want to accept points that fall
// in the underlying image's (scaled to fit) native bounds. That region
// doesn't necessarily map to our <image> element's [x,y,width,height] if the
// raster image's aspect ratio is being preserved. We have to look up the
// native image size & our viewBox transform in order to filter out points
// that fall outside that area. (This special case doesn't apply to vector
// images because they don't limit their drawing to explicit "native
// bounds" -- they have an infinite canvas on which to place content.)
if (StyleDisplay()->IsScrollableOverflow() && mImageContainer) {
if (mImageContainer->GetType() == imgIContainer::TYPE_RASTER) {
int32_t nativeWidth, nativeHeight;
if (NS_FAILED(mImageContainer->GetWidth(&nativeWidth)) ||
NS_FAILED(mImageContainer->GetHeight(&nativeHeight)) ||
nativeWidth == 0 || nativeHeight == 0) {
return nullptr;
}
mImageContainer->GetResolution().ApplyTo(nativeWidth, nativeHeight);
Matrix viewBoxTM = SVGContentUtils::GetViewBoxTransform(
rect.width, rect.height, 0, 0, nativeWidth, nativeHeight,
element->mPreserveAspectRatio);
if (!SVGUtils::HitTestRect(viewBoxTM, 0, 0, nativeWidth, nativeHeight,
aPoint.x - rect.x, aPoint.y - rect.y)) {
return nullptr;
}
}
}
return this;
}
//----------------------------------------------------------------------
// SVGGeometryFrame methods:
// Lie about our fill/stroke so that covered region and hit detection work
// properly
void SVGImageFrame::ReflowSVG() {
NS_ASSERTION(SVGUtils::OuterSVGIsCallingReflowSVG(this),
"This call is probably a wasteful mistake");
MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),
"ReflowSVG mechanism not designed for this");
if (!SVGUtils::NeedsReflowSVG(this)) {
return;
}
float x, y, width, height;
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
element, &x, &y, &width, &height);
Rect extent(x, y, width, height);
if (!extent.IsEmpty()) {
mRect = nsLayoutUtils::RoundGfxRectToAppRect(extent, AppUnitsPerCSSPixel());
} else {
mRect.SetEmpty();
}
if (mState & NS_FRAME_FIRST_REFLOW) {
// Make sure we have our filter property (if any) before calling
// FinishAndStoreOverflow (subsequent filter changes are handled off
// nsChangeHint_UpdateEffects):
SVGObserverUtils::UpdateEffects(this);
if (!mReflowCallbackPosted) {
mReflowCallbackPosted = true;
PresShell()->PostReflowCallback(this);
}
}
nsRect overflow = nsRect(nsPoint(0, 0), mRect.Size());
OverflowAreas overflowAreas(overflow, overflow);
FinishAndStoreOverflow(overflowAreas, mRect.Size());
RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
NS_FRAME_HAS_DIRTY_CHILDREN);
// Invalidate, but only if this is not our first reflow (since if it is our
// first reflow then we haven't had our first paint yet).
if (!GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
InvalidateFrame();
}
}
bool SVGImageFrame::ReflowFinished() {
mReflowCallbackPosted = false;
// XXX(seth): We don't need this. The purpose of updating visibility
// synchronously is to ensure that animated images start animating
// immediately. In the short term, however,
// nsImageLoadingContent::OnUnlockedDraw() is enough to ensure that
// animations start as soon as the image is painted for the first time, and in
// the long term we want to update visibility information from the display
// list whenever we paint, so we don't actually need to do this. However, to
// avoid behavior changes during the transition from the old image visibility
// code, we'll leave it in for now.
UpdateVisibilitySynchronously();
return false;
}
void SVGImageFrame::ReflowCallbackCanceled() { mReflowCallbackPosted = false; }
uint16_t SVGImageFrame::GetHitTestFlags() {
uint16_t flags = 0;
switch (Style()->PointerEvents()) {
case StylePointerEvents::None:
break;
case StylePointerEvents::Visiblepainted:
case StylePointerEvents::Auto:
if (StyleVisibility()->IsVisible()) {
/* XXX: should check pixel transparency */
flags |= SVG_HIT_TEST_FILL;
}
break;
case StylePointerEvents::Visiblefill:
case StylePointerEvents::Visiblestroke:
case StylePointerEvents::Visible:
if (StyleVisibility()->IsVisible()) {
flags |= SVG_HIT_TEST_FILL;
}
break;
case StylePointerEvents::Painted:
/* XXX: should check pixel transparency */
flags |= SVG_HIT_TEST_FILL;
break;
case StylePointerEvents::Fill:
case StylePointerEvents::Stroke:
case StylePointerEvents::All:
flags |= SVG_HIT_TEST_FILL;
break;
default:
NS_ERROR("not reached");
break;
}
return flags;
}
//----------------------------------------------------------------------
// SVGImageListener implementation
NS_IMPL_ISUPPORTS(SVGImageListener, imgINotificationObserver)
SVGImageListener::SVGImageListener(SVGImageFrame* aFrame) : mFrame(aFrame) {}
void SVGImageListener::Notify(imgIRequest* aRequest, int32_t aType,
const nsIntRect* aData) {
if (!mFrame) {
return;
}
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
mFrame->InvalidateFrame();
nsLayoutUtils::PostRestyleEvent(mFrame->GetContent()->AsElement(),
RestyleHint{0},
nsChangeHint_InvalidateRenderingObservers);
SVGUtils::ScheduleReflowSVG(mFrame);
}
if (aType == imgINotificationObserver::FRAME_UPDATE) {
// No new dimensions, so we don't need to call
// SVGUtils::InvalidateAndScheduleBoundsUpdate.
nsLayoutUtils::PostRestyleEvent(mFrame->GetContent()->AsElement(),
RestyleHint{0},
nsChangeHint_InvalidateRenderingObservers);
mFrame->InvalidateFrame();
}
if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
// Called once the resource's dimensions have been obtained.
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
if (image) {
image = nsLayoutUtils::OrientImage(
image, mFrame->StyleVisibility()->mImageOrientation);
image->SetAnimationMode(mFrame->PresContext()->ImageAnimationMode());
mFrame->mImageContainer = std::move(image);
}
mFrame->InvalidateFrame();
nsLayoutUtils::PostRestyleEvent(mFrame->GetContent()->AsElement(),
RestyleHint{0},
nsChangeHint_InvalidateRenderingObservers);
SVGUtils::ScheduleReflowSVG(mFrame);
}
}
} // namespace mozilla
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